Other (Expense) Income, Net - Components (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Investment income, net
Interest and dividend income	$ 6	$ 1,637	$ 1,117	$ 5,752
Accretion income	13		60	84
Net realized gain (loss) on the sale of investments		28	(48)	26
Unrealized gain (loss) on investments, net	270	(1,439)	(4,633)	(1,305)
Interest income from investments in SPEs	2,045	2,047	6,136	6,143
Interest accrued on notes receivable and other interest	71	98	219	252
Total investment income, net	2,405	2,371	2,851	10,952
Interest expense
Interest expense and amortization of discount and issuance costs for Senior Notes issued by SPE	(2,204)	(2,201)	(6,609)	(6,599)
Other interest expense	(1,175)	(908)	(3,504)	(2,476)
Total interest expense	(3,379)	(3,109)	(10,113)	(9,075)
Other income (expense), net
Gain on land contribution to equity method investment		846	19,615	2,317
Accretion income from retained interest investments	349	335	1,034	982
Gain on insurance recovery		1,243		5,314
Loss from hurricane damage	594	575	1,096	1,703
Miscellaneous income, net	512	298	723	216
Other income, net	267	2,147	20,276	7,126
Total other (expense) income, net	$ (707)	$ 1,409	$ 13,014	$ 9,003